In my opinion circle feeders, also called table feeders, are mechanical rotating devices and as such require maintenance. In addition if the rotating table seizes inside the bin, it is almost impossible to free it up without emptying the entire bin.

To prevent bridging the first step should be that the bin is designed in such a way that it does not bridge. But if bridging is unavoidable due to time consolidation, a simple cure is to maintain a small flow from the bin by using external circulation by a "powder pump".

Regards

Amrit Agarwal (Tim)

Pneumatic Conveying Consultants ■